vfio/mlx5: Enforce PRE_COPY support

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Enable live migration only once the firmware supports PRE_COPY.

PRE_COPY has been supported by the firmware for a long time already [1]
and is required to achieve a low downtime upon live migration.

This lets us clean up some old code that is not applicable those days
while PRE_COPY is fully supported by the firmware.

[1] The minimum firmware version that supports PRE_COPY is 28.36.1010,
it was released in January 2023.

No firmware without PRE_COPY support ever available to users.

Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://lore.kernel.org/r/20240306105624.114830-1-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

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This commit is contained in:

Yishai Hadas 2024-03-06 12:56:24 +02:00 • committed by Alex Williamson

parent 626f534d77

commit 821b8f6bf8

3 changed files with 71 additions and 127 deletions

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83

drivers/vfio/pci/mlx5/cmd.c

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6

drivers/vfio/pci/mlx5/cmd.h

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109

drivers/vfio/pci/mlx5/main.c

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